Provided is an article comprising a flexible tube having an inner surface, an outer surface, a first end and a second end, the inner surface at least partially covered with a low friction material. Also provided is an article comprising a cold shrinkable sleeve disposed on a tubular support core in a stretched condition, at least a portion of the cold shrinkable sleeve folded such that at least one portion of the cold shrinkable sleeve overlaps another portion of the cold shrinkable sleeve, wherein a flexible tube having an inner surface, an outer surface, a first end and a second end, the inner surface at least partially covered with a low friction material, is positioned between the overlapping portions of the cold shrinkable sleeve.